SOLUTION EQUILIBRIA FOR URANIUM ORE PROCESSING: THE BASO4-H2SO4-H2O SYSTEM AND THE RASO4-H2SO4-H2O SYSTEM - THE FESO4-H2SO4-H2O SYSTEM
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dc.contributor.author | Paige C.R. | |
dc.contributor.author | Kornicker W.A. | |
dc.contributor.author | Hileman O.E. | |
dc.contributor.author | Snodgrass W.J. | |
dc.date.accessioned | 2020-12-28T12:18:43Z | |
dc.date.available | 2020-12-28T12:18:43Z | |
dc.date.issued | 1998 | |
dc.identifier | https://elibrary.ru/item.asp?id=41476 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1998, , 1, 15-23 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/21506 | |
dc.description.abstract | A radio-tracer determination of the solubility of BaSO4 in H2SO4-H2O mixtures was undertaken at temperatures of 25°C and 60°C. These were subsequently modelled using the Pitzer model for the activity coefficients, and estimates were made for Ba2+-SO42- and Ba2+-HSO4- interaction parameters. The final model yields an excellent description of the solubility of BaSO4 in H2SO4-H2O mixtures up to 6 mol/kg and at both 25°C and 60°C. The logarithm of the thermodynamic solubility product constant (logKsp) for barite obtained by regression analysis was -10.02 +/- 0.02 at 25°C and -9.68 +/- 0.01 at 60°C. The values of the ion association constant derived from these data are 2.49 +/- 0.03 at 25°C and 2.55 +/- 0.1 at 60°C. The enthalpy of dissolution for BaSO4 was estimated to be 17.6 +/- 0.2 kJ mol-1.Literature solubility data for the RaSO4-H2SO4-H2O system have also been interpreted, using the Pitzer model for the necessary activity coefficients. The logarithm of the thermodynamic solubility product constant (logKsp) for radium sulfate obtained was -10.21 +/- 0.06 at 25°C, while the value of the ion association constant derived is 2.76 +/- 0.05 at 25°C. The high negative value of the Pitzer parameter β2 obtained by regression analysis of these data suggests that the explicit recognition of a RaSO4(aq) ion association species is to be preferred in this case. | |
dc.title | SOLUTION EQUILIBRIA FOR URANIUM ORE PROCESSING: THE BASO4-H2SO4-H2O SYSTEM AND THE RASO4-H2SO4-H2O SYSTEM - THE FESO4-H2SO4-H2O SYSTEM | |
dc.type | Статья |
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